+ # "ip -o addr show" has a ridiculous output format. In
+ # particular, it mixes output keywords which introduce
+ # values with ones which don't, and there seems to be
+ # no way to tell without knowing all the possible
+ # keywords. We hope that before the \ there is nothing
+ # which contains arbitrary text (specifically, which
+ # might be `tentative' other than to specify IPv6
+ # tentativeness). We have to do this for IPv6 only
+ # because in the IPv4 output, the interface name
+ # appears here!
+ next if $ip==6 && $rhs=~m{[^\\]* tentative\s};